In a lively show, mathematician and magician Arthur Benjamin races a team of calculators to figure out 3-digit squares, solves another massive mental equation and guesses a few birthdays. How does he do it? He’ll tell you. (15:18)

Students will learn different strategies to determine the product of a multiplication problem. Skip counting on a number line, drawing a picture, drawing an array and writing a multiplication sentence are different strategies for finding the product.... User clicks through the slides.[more]

Demonstrate the process of multiplication as repeatedly adding the same number, counting by multiples, combining equal sets, and making arrays. Solve word problems using grade level appropriate operations and numbers.

Lesson Objective:Students find the rule that determines the number of chessboard squares. Questions to Consider:See how Ms. Bottomley uses a function machine to have students predict the ruleHow does the lesson help students see the difference betwee...n additive and multiplicative patterns?What about the lesson helps students be successful with this complex pattern?Common Core StandardsMath.4.OA.2, Math.4.OA.5
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